Water Cutoff (Lwco) Capacitor Integrity Test - Aerco Benchmark BMK 750 User Manual

Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
SECTION 4 – MAINTENANCE
Air Filter Cleaning and Replacement Instructions
5. The filter may be cleaned in hot soapy water to remove oil and dirt. It should then be
thoroughly dried and then sprayed with a light coating of K&N® Air Filter Oil (or equivalent
specifically formulated for air filters) prior to reinstallation. Do NOT use WD-40.
6. Each replacement air filter is equipped with its own clamp. Therefore, simply install the
replacement air filter on inlet flange of the air fuel valve and tighten the clamp with a flat-tip
screwdriver or 5/16" nut driver.
7. Replace the top shroud on the unit and return boiler to service use.

4.9 WATER CUTOFF (LWCO) CAPACITOR INTEGRITY TEST

The LWCO capacitor should be tested for electrical shorts every 12 months and replaced,
then tested, every 24 months. The LWCO capacitor integrity test consists of two parts as
described in the next two sections. The first procedure explains how to test for electrical
shorting of the LWCO probe capacitor, while the second procedure instructs how to perform
the standard Low Water Cutoff test using the C-More controls.
Refer to Figure 4-9 for an illustration of the LWCO probe assembly and its typical installation.
Rear
Panel
Hot Water
Outlet Pipe
Figure 4-9: LWCO Probe Location (BMK1500 Shown)
OMM-0128_0C
GF-206-K
LWCO Probe
Terminal
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
LWCO Probe
Plastic Acorn Nut
Capacitor Assembly
(Covered By Large
Shrink Tubing)
Connector
(to Shell Harness)
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11/29/2017